CetTaria

{se-tra’ -re-ah) [aztra, a short Spanish shield]. I. A genus of lichens. 2. Iceland mo , — a lichen, C. islandica, found in Iceland and other northern countries. It contains a form of starch, lichenin, that gelatinizes when boiled with water. It is a feebly tonic demulcent, sometimes used in pulmonary affections. C. Decoct. (B. P.), contains five per cent, of the lichen. Dose f^ ij-iv i 64.0-128.0). Chagres Fever. See F/ver. Chalaza | kai-a’-zak) [\a/.aZa, a hailstone]. One of the twisted cords binding the yolkbag of an egg to the lining membrane of the shell; or that part of a seed where its coats unite with each other and the nucleus. 184